/// <summary>
/// Get called when Region is left
/// </summary>
/// <param name="region">Region thats left.</param>
private void OnRegionLeft(CLRegion region)
{
if (!this.geofenceResults.ContainsKey(region.Identifier))
{
this.geofenceResults.Add(
region.Identifier,
new GeofenceResult
{
RegionId = region.Identifier
});
}
if (this.LastKnownLocation != null)
{
this.geofenceResults[region.Identifier].Latitude = this.LastKnownLocation.Latitude;
this.geofenceResults[region.Identifier].Longitude = this.LastKnownLocation.Longitude;
this.geofenceResults[region.Identifier].Accuracy = this.LastKnownLocation.Accuracy;
}
else
{
this.geofenceResults[region.Identifier].Latitude = region.Center.Latitude;
this.geofenceResults[region.Identifier].Longitude = region.Center.Longitude;
this.geofenceResults[region.Identifier].Accuracy = region.Radius;
}
this.geofenceResults[region.Identifier].LastExitTime = DateTime.Now;
this.geofenceResults[region.Identifier].Transition = GeofenceTransition.Exited;
CrossGeofence.GeofenceListener.OnRegionStateChanged(this.geofenceResults[region.Identifier]);
if (this.Regions[region.Identifier].ShowNotification)
{
GeofenceImplementation.CreateNotification(ViewAction, string.IsNullOrEmpty(this.Regions[region.Identifier].NotificationExitMessage) ? this.GeofenceResults[region.Identifier].ToString() : this.Regions[region.Identifier].NotificationExitMessage);
}
}
/// <summary>
/// Get Called on RegionEntered.
/// </summary>
/// <param name="region">Region entered.</param>
private async void OnRegionEntered(CLRegion region)
{
if (this.GeofenceResults.ContainsKey(region.Identifier) && this.GeofenceResults[region.Identifier].Transition == GeofenceTransition.Entered)
{
return;
}
if (!this.geofenceResults.ContainsKey(region.Identifier))
{
this.geofenceResults.Add(
region.Identifier,
new GeofenceResult
{
RegionId = region.Identifier
});
}
if (this.LastKnownLocation != null)
{
this.geofenceResults[region.Identifier].Latitude = this.LastKnownLocation.Latitude;
this.geofenceResults[region.Identifier].Longitude = this.LastKnownLocation.Longitude;
this.geofenceResults[region.Identifier].Accuracy = this.LastKnownLocation.Accuracy;
}
else
{
this.geofenceResults[region.Identifier].Latitude = region.Center.Latitude;
this.geofenceResults[region.Identifier].Longitude = region.Center.Longitude;
this.geofenceResults[region.Identifier].Accuracy = region.Radius;
}
this.geofenceResults[region.Identifier].LastEnterTime = DateTime.Now;
this.geofenceResults[region.Identifier].LastExitTime = null;
this.geofenceResults[region.Identifier].Transition = GeofenceTransition.Entered;
if (region.NotifyOnEntry)
{
CrossGeofence.GeofenceListener.OnRegionStateChanged(this.geofenceResults[region.Identifier]);
if (this.Regions.ContainsKey(region.Identifier) && this.Regions[region.Identifier].ShowNotification)
{
GeofenceImplementation.CreateNotification(ViewAction, string.IsNullOrEmpty(this.Regions[region.Identifier].NotificationEntryMessage) ? this.GeofenceResults[region.Identifier].ToString() : this.Regions[region.Identifier].NotificationEntryMessage);
}
}
// Checks if device has stayed asynchronously
await GeofenceImplementation.CheckIfStayed(region.Identifier);
}
/// <summary>
/// Checks if has passed to stayed state
/// </summary>
/// <returns>The if stayed.</returns>
/// <param name="regionId">Region identifier.</param>
public static async Task CheckIfStayed(string regionId)
{
if (CrossGeofence.Current.GeofenceResults.ContainsKey(regionId) && CrossGeofence.Current.Regions.ContainsKey(regionId) && CrossGeofence.Current.Regions[regionId].NotifyOnStay && CrossGeofence.Current.GeofenceResults[regionId].Transition == GeofenceTransition.Entered && Math.Abs(CrossGeofence.Current.Regions[regionId].StayedInThresholdDuration.TotalMilliseconds) > float.Epsilon)
{
await Task.Delay((int)CrossGeofence.Current.Regions[regionId].StayedInThresholdDuration.TotalMilliseconds);
if (CrossGeofence.Current.GeofenceResults[regionId].LastExitTime == null && CrossGeofence.Current.GeofenceResults[regionId].Transition != GeofenceTransition.Stayed)
{
CrossGeofence.Current.GeofenceResults[regionId].Transition = GeofenceTransition.Stayed;
CrossGeofence.GeofenceListener.OnRegionStateChanged(CrossGeofence.Current.GeofenceResults[regionId]);
if (CrossGeofence.Current.Regions[regionId].ShowNotification)
{
GeofenceImplementation.CreateNotification(ViewAction, string.IsNullOrEmpty(CrossGeofence.Current.Regions[regionId].NotificationStayMessage) ? CrossGeofence.Current.GeofenceResults[regionId].ToString() : CrossGeofence.Current.Regions[regionId].NotificationStayMessage);
}
}
}
}
/// <summary>
/// Get current 20 monitored regions.
/// </summary>
/// <param name="regions">List of all regions</param>
/// <returns>current 20 monitored regions</returns>
public IList <GeofenceCircularRegion> GetCurrentRegions(IList <GeofenceCircularRegion> regions)
{
IList <GeofenceCircularRegion> nearestRegions;
if (regions.Count > 20)
{
if (this.locationManager.Location != null)
{
IEnumerable <GeofenceCircularRegion> newRegions = regions.OrderBy(r => GeofenceImplementation.CalculateDistance(this.locationManager.Location.Coordinate.Latitude, this.locationManager.Location.Coordinate.Longitude, r.Latitude, r.Longitude)).Take(20);
nearestRegions = newRegions.ToList();
}
else
{
nearestRegions = regions.Take(20).ToList();
}
}
else
{
nearestRegions = regions;
}
return(nearestRegions);
}